Improvement in chimneys



P RICHARDSON. CHIMNEY.

' .N-o, 102,042. Patented. Apr. 19; 1870.

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FRANCISRIGHARDSON OF HEBRON,ILLINOIS Letters Patent No. 102,042, dated April '19, 1870.

IMPROVEMENT IN CHIMNEYS.

The Schedule referred to in these Letters Patent and making part of the same I, FRANCIS RICHARDSON, of Hebron, in the county of McHenry and State of Illinois, have invented certain Improvements in Chimneys, of which the following is a Specification.

Nature and Objects of the Invention.

The first part of my invention relates to constructing chimneys double, or with two fines at their-lower ends, 01' immediately over the fire-place, said flues approaching, coming nearly together, and continuing so to the chimney-shaft.

The object of this part of my invention being for purposes hereafter described.

The, second part of my invention relates to the arrangement of the throats or openings leading from the fire-place to the dual chimneys, so arranged as to and chimney, with a portion cut away, showing my.

improvements.

Figure 2 is a rear elevation, with a portion cut away, showing also my improvements.

. I General Description.

A is the fire-place, the back part of which is vertical on. the face.

B Bare the side jambs, which may be constructed either square or flaring, to burn either coal or wood, as desired.

0 is a cavity over the fire-place, the front part of which tapers from the base to near the back at the top l) D are the fines, one on each side of the fireplace, their lower ends vertical for some distance,

' their bases commenced on a; level with the top of the side-jambs B B, and theirdistance apart just equal to the width of the fire-place A.

From the vertical part, at their lower ends, the flues D D approach each other until they come nearly together, running so until they reach -the top of the chimney-shaft.

E E are rectangular openings or throats leading from the sides of the fire-place into the sides of the fines D D, their lower ends being on a level with the lower ends of fines D and their upper ends extending to the top of the cavity 0.

F F are rectangular openings in the back of the cavity 0, their lower ends extending a few inches below the level of the bottom of the flues D D, and their tops reaching to within a few inches of the top of the cavity 0.

G G are passages or flues leading from the throats F F to the vertical part of the fines D D, as shown.

The situation of the throats F F being such as to allow rise suflicient in the passages G G to facilitate the draught.

The-size of the passages G G in their cross-section should be about twice the number of square inches contained in one of the throats F F.

This improved chimney may be constructed of brick or any other suitable material, and it will be readily seen that the arrangement of the throats and fines is such that either passage leading into the main flue and receiving heated ascending air from the fire, which may be only burning briskly near its throat, will in its ascent create a draught in the other throats and prevent the accumulation of cold or dead air, as in the case of ordinary fines; this cold air, accumulating in the throats of ordinary chimneys, when the fire is only burning briskly at one side, creating a contrary current to the ascending, and being the main cause of smoky chimneys.

Dampers may be placed in the side flues and the draught controlled, if desired.

0 lat'ms.

Witnesses:

RoBT. WEGG, WM. Oxnn'mn. 

